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3 years ago

What is the value of z in the equation 2z + 8 = −6? −1 −7 1 7

Mathematics

1 answer:

vitfil [10]3 years ago

4 0

Answer:

So the answer is -7

Step-by-step explanation:

2z + 8 = −6

2z + 8 -8 = -6 -8 ( add - 8 for both sides)

2z = -14

2z/2 = -14/2 (divide both sides by 2)

z = - 7

So the answer is -7

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Prove or disprove that the circle with equation x^2-4x+y^2=-3 intersects the y axis

wel

The general equation given is x^2 - 4x + y^2 = -3. Transform this to an equation of a circle of the form x^2 + y^2 = r^2.

Use completing the square method:

x^2 - 4x + 4 + y^2 = -3 + 4
(x - 2)^2 + y^2 = 1

the center of the circle is (2,0) and r = 1

To check if it intersects the y axis, find the value of the x-intercept.

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3 years ago

Which is the standard form of the equation of the parabola shown in the graph?

djverab [1.8K]

Answer:

Step-by-step explanation:

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2 years ago

Read 2 more answers

After writing part of his novel, Thomas is now writing 16 pages per week. After 4 weeks, he has written 85 pages. Assume the rel

d1i1m1o1n [39]

The initial value is 21 and rate of change is 16 pages per week

Solution:

Given that After writing part of his novel, Thomas is now writing 16 pages per week

After 4 weeks, he has written 85 pages.

Given that assume the relationship to be linear

Linear relationships can be expressed either in a graphical format or as a mathematical equation of the form y = mx + c

y = mx + c

where "y" is the number of pages written after 4 weeks

x = 4 weeks and m = 16 pages

Therefore,

85 = 16(4) + c

85 = 64 + c

c = 85 - 64

c = 21

Therefore, initial value is 21 and rate of change is 16 pages per week

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2 years ago

Can you answer this?

nignag [31]

The answer is the graph b.

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2 years ago

PLESE HELP YOU WILL GET ALOT OF POINTS

Vedmedyk [2.9K]

Answer:

It's a (space) lot,... haha na I just kidding,... you're good,... I mean I'm not kidding cause it is correct,... but you are good,... like totally cool,... anyway,...

Step-by-step explanation:

By x the just mean what number,... so,...

what number + 6 = 7,

6 + what number = 7,

2 + what number + 5 = 7,

1 + what number = 7,

what number + 4 + what number = 7,

So that is what it mean,... hope it helps, alot LOL,... and,... Chow

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2 years ago